Former New York City Mayor Michael Bloomberg will reassume leadership of his financial data and media company, Andrew Ross Sorkin reported Wednesday. Daniel L. Doctoroff, the current chief executive of Bloomberg L.P., will leave the company at the end of the year.

Michael Bloomberg, the outgoing three-term mayor of New York, is planning to return to his namesake Bloomberg L.P. in a role that will see him primarily involved in its online opinion offering, Bloomberg View